Comment you really should just go to a store... (Score 1) 282
You need to take your stuff to a proper store and figure this out.. I have gone through a ton of bags before being reasonably satisfied w/ the lowepro 250 (which is fine with the 70-200/f4 and the 17" macbook pro), which is my day trip and airplane travel bag. Even with this I also use an old velocity 7 for wandering around with because it is lighter and I can leave my laptop @ the hotel / home. For international 3rd world travel / hiking I use the velocity bag as an insert to a normal camping bag. This gives you the proper framing that camping bags have and also doesn't scream out rob me and is also not easily unzipped from the back.